Movie night W 4/21 at 5pm in JES A121A Today: What happens near the carrying capacity? What is biodiversity?

Exam averages: #1 = 78.7 #2 = 73.5 #3 = 67.4

Ecological Interconnections

Fig 52.7 Carrying Capacity stationary phase exponential growth

Availability of resources and removal of waste limits carrying capacity Fig 54.1

What happens as populations approach their carrying capacity? Fig 53.13

What happens as populations approach their carrying capacity? Fig 53.13

What happens as populations approach their carrying capacity?

What happens as populations approach their carrying capacity?

36.4 9 2.3 UN Department of Economic and Social Affairs Population Division (2004)

Annual % increase in global population Fig 53.23

How much of our society is based on continuing population increases? 36.4 9 2.3 UN Department of Economic and Social Affairs Population Division (2004)

Unfortunately there is lots of bad news... Fig 56.4 Unfortunately there is lots of bad news... FEWER THAN 100 REMAIN EXTINCT FEWER THAN 100 REMAIN

Unfortunately there is lots of bad news... and it is your fault.

Rainforest clear cutting CB 55.15

Dead zone in Gulf of Mexico from Mississippi River Human impacts: Dead zone in Gulf of Mexico from Mississippi River Fig 55.18 http://blog.nola.com/times-picayune/2007/06/despite_promises_to_fix_it_the.html

New species and extinction Fig 25.14 New species and extinction

Biodiversity- number of species within an area Fig 56.3 Genetic Diversity Biodiversity- number of species within an area Ecosystem Diversity

If a species loses genetic diversity, it can go extinct Fig 56.11

Fig 56.10 Extinction vortex

Biodiversity- number of species within an area Fig 56.3 Genetic Diversity Biodiversity- number of species within an area Ecosystem Diversity

Biological Resources are not evenly distributed Fig 55.6 Biological Resources are not evenly distributed

Number of bird species: Areas of higher and lower biodiversity reflect available resources

Biodiversity “hot spots” have plentiful resources and large numbers of species Fig 56.17

Larger areas can support more biodiversity Fig 54.28 Islands

Larger areas can support more biodiversity Fig 54.26 # bird species

Water is critical for biodiversity Fig 54.25

New species can have an affect throughout the ecosystem Fig 54.16

Interactions include area, climate, competition...

Movie night W 4/21 at 5pm in JES A121A Today: What happens near the carrying capacity? What is biodiversity?